Argentaffin and migrating mast cells in the bovine gallbladder epithelium

This paper reports the existence of 2 different types of granulated cells within the bovine gallbladder epithelium. Electron microscopic examination of the tissue reveals that one of these types belongs to "mast cells" that migrate from the lamina propia towards the epithelium. The other type is constituted by "argentaffin or endocrine cells" always located in the basal aspect of the epithelium. Both cells contain granules of different sizes and shapes and exhibit distinct morphological features. The existence of migrating mast cells and argentaffin cells suggests that they play different roles in the bovine gallbladder epithelium.